Check out the FENA colour chart.
There is a distinction between the Ferguson Gray M-1001 for TE20 tractors, and the Ferguson Light Gray M-1011 for early FE35, (which I presume is the Grey and gold).
There is not a lot of difference between these two colours. I think the N53 is closer to the Ferguson Gray M-1001.
As for the Gold, it is listed by FENA as M-1029 Bronze (engine gold). I don't know if there is an equivalent Australian Standard colour. There are some gold colours but I don't know if they are anything like the Ferguson gold.
The FENA document mentions a gold available in Australia from AGCO/MF dealers as 3931 029 M5. Don't know if it is available.